||Photochemical Reduction of Zn-Etioporphyrin in Frozen Solutions; Structure of Reduced Forms (Fotokhimicheskoe Vosstanovlenie Zn-Etioporfirina v Zamorozhennykh Rastvorakh. Struktura Vosstanovlennykh Form).
Sidorov., A. N. ;
||Environmental Protection Agency, Research Triangle Park, N.C. Translation Services Section.
Photochemical reactions ;
Metal complexes ;
Zinc organic compounds ;
Spectrochemical analysis ;
Low temperature research ;
Molecular structures ;
||Some EPA libraries have a fiche copy filed under the call number shown.
||It has been found that solutions of Zn-etioporphyrin in N-containing organic bases (lutidine, N-methylpiperidine, triethylamine), frozen at -196C, are capable of photochemical conversions. Comparison of the properties and spectral characteristics of the photoproducts formed with properties of protonated Zn-etioporphyrin dianions, produced by chemical methods, permits the following scheme to be proposed for conversion of Zn-etioporphyrin in organic bases (P, Zn-etioporphyrin molecule; D, molecule of base, which is both an electron donor and a proton donor to the P molecule). The first stage observable spectrally is photoreduction in the frozen solution. The hydroderivative formed in frozen solution is capable of again splitting off a proton during irradiation. Thermal addition of a proton to the PH(-) and its subsequent photocleavage in frozen solution can be reproduced repeatedly in one and the same sample. The central metal atom has a significant effect on the photochemical behavior of a methyl-porphyrin in solution.
||Trans. of Biofizika (USSR) v18 p144-148 Jan-Feb 73.
||+++Photochemical Reduction of Zn-Etioporphyrin in Frozen Solutions; Structure of Reduced Forms (Fotokhimicheskoe Vosstanovlenie Zn-Etioporfirina v Zamorozhennykh Rastvorakh. Struktura Vosstanovlennykh Form)--Translation.
|PUB Date Free Form
||PC A02/MF A01